I don't think the problem is the height they allow, it's that they allow 7'3" guys to do incredible things at lower ratings.
Not every 7'3" guy should be able to become Godzingis. Most guys that tall end up being players like Boban Marjanović and Walter Tavares, which means they're slow, can barely jump and have next to no post moves outside of dunking. If you're an 82 overall 7'3" guy, you should literally only be good at rebounding, blocks and dunking from under the basket.
I say they just nerf the heck out of anyone taller than 7'1" so you're unable to get any gold/hof badges outside of rebounds and blocks. That'd really reel in the amount of huge guys.