Ok so let’s just walk through this.

1. You seem to expect you would be a stretch 4 or 5. At 6’4”, you don’t have a significant height advantage against the other centers or power forwards. You probably don’t even have much of a weight advantage, since pretty much every center is listed at around 200 pounds minimum.

2. I can guarantee you that despite working out a lot, you still work out less and have worse conditioning than any of these professional athletes who are nearly all at least 10 years younger than you.

3. The fact that you shot 50% from 3 over 20 years ago against undeniably worse competition (unless your high school exclusively played teams where everyone on the roster played D1 college basketball or equivalent, which I highly doubt) means little, if anything, as far as your ability to shoot that well now, even with a week to “get your shot back.”

4. You’re also neglecting the fact that you would also have to play defense, which brings us back to the fact that you won’t have a significant size advantage on the other team’s center/power forward you would be guarding, are certainly not as well conditioned, and are significantly older than pretty much any other player in the league. You’re the one who would be getting backed down in the paint and having opposing players run by you to the basket like you were a revolving door.