"I’m talking about becoming someone with strong moral fiber, a zeal for life, and complete comfort in who they are and what they’re all about." I think that this is exactly not what you want to do to find a life partner. Whether you are a man or a woman, if you do this, you will find that (almost) all of your potential partners are shallow and extremely disappointing. Moreover, the people you are attracted to will be…
When that is achieved your dating options will explode (relative to whatever they are now). The fact that 80% of them are shallow will be irrelevant because the pool of candidates will be much larger.
But if your pool is small and scant of fish, and is destined to always be that way, keeping your standards low would be useful advice, yes.