I don't know why but our profession for some reason is different than the others in this respect and people often like to think that this is a norm and if you're not doing it you're not worthwhile. I think it has to do with some interesting psychological effects of people who are generally attracted to this profession but also due to the companies who implemented those mental hacks as a means to attract people who are 100% for it. Leetcode style interviews where you virtually have to spend months to prepare oneself for the interview, even as a senior, is one example of that but I also do remember the age, which was not too long ago, where your resume wouldn't even get a look if you didn't have several open-source repositories/contributions to show. This is in some part even valid as of today.
There are plenty of such examples but both of these imply that you're ready to devote a lot of your extra time, before or after the job, only that you can show you're relevant in the eyes of those who are the decision makers. This normally means that you're single, that you have no kids, family, no other hobbies but programming etc. This works when you're in your 20's and only up to the certain point unless you become a weirdo in your 30's and 40's etc. without any of these.
However, in the age where we are met with the uncertainty, it may become a new normal to devote extra effort in order to be able to remain not competitive but a mere candidate for the job. Some will find the incentive for this extra pain, some will not but I think it won't be easy. Perhaps in 5 years time we will only have "AI applied" engineers developing or specializing their own models for given domains. Writing code as we have it today I think it's already a thing of a past.