Again, FUD. If you really need me to spell out why then I will, but I doubt it will change your viewpoint.
Let me spell it out for you:
You build your awesome [app] for [client]. You get your schema bang on first time and it's all working absolutely fine. Everyone is happy.
Then [client] comes to you and says "[app] is awesome, but we need [x]". You think, and [x] needs some database modifications. Maybe it's a new column to store something, or perhaps it's a column that now shouldn't be nullable. Maybe it's a new table entirely. Perhaps what you need is already implemented in library [y], which needs database modifications of some kind like it's own tables. The possibilities are endless.
Great. So how do we do this. Obviously we need to run some SQL on the database. So you change all your code, press deploy, and really quickly log onto the production server and smash out some artisanal SQL to modify the database before any requests hit the server. Everyone is happy! You quickly write an email all your co-workers to do these migrations locally so they can run the app.
Oh no, but wait, you forgot to do operation Z! Now your app and everyone elses is broken. You resolve to ensure this doesn't happen again by writing a .sql file for each migration and running them in sequence. Great, you can even check them into your VCS and share them with your co-workers. Awesome! You can even make them part of your CI build (you do that, right?).
You do another deploy, but nuts, something went wrong! You need to roll a migration back! But you only added forward migrations in your .sql files! Ok, so lets add [migration]-backwards.sql and [migration]-forwards.sql from now on. Awesome! So you've got a forwards and backwards migrations. But... wait, we need to run some Python code to do something as part of the migration. Ok... lets add a [migration]-{forwards}.py as well.
Fantastic. But then you start to install package [z] because it does exactly what the client wants and you realize the benefits of using well tested, widely used libraries in your systems and not writing everything by hand. This requires some database modifications. The author of this package has the migrations it needs but it's in it's own home-grown format and it's only for MySQL and Oracle! Nuts, ok, so you translate them by hand and add them to your migrations. But you made a mistake somewhere in the translation and everything breaks. You fix it by hand.
Congratulations. You've just written a shit version of Django migrations that everyone hates and that doesn't really work.
tl;dr: schema changes are a natural part of development. You, me, and everyone else working on any kind development project has done them. They happen, this is a fact. If you need to:
1. Share the migrations in your team
2. Run them as part of your CI build
3. Use third party migrations for packages (including built in contenttypes or other core Django tables)
4. Have them in a format that works for any supported database
5. Have rollback and the ability to execute arbitrary code as part of the migration
Then you can either write your own shitty version or use a well supported, built in system that handles the complexity for you. This is not a bad thing.
I can't comprehend your viewpoint, which mostly boils down to "these damn kids are on my lawn", so I can only imagine your setup is some ad-hoc .sql files that you run by hand.
This is a bad thing.