If you have friends in Real Estate who overstated the value of their assets to the same degree as Trump, then they are fraudsters as well.
The problem is not that that he padded values 10-20-30%, which I agree happens every day. He massively misstated the values and the facts of the underlying properties and did it repeatedly. He tripled the size of his NY apartment and misstated the value of Mar-a-Lago by 1000%, at least (it's zoned as a club and can't be developed, something he had to agree to when he bought the property).
He did this to secure better loan terms (covenants and rates) that constitute a direct competitive advantage. It does not matter that he met the advantaged terms that he procured through fraud. It's still against the law.
And part of the reason Trump is a magnet for prosecutions is because he has a history of fraud. Trump University was shut down for fraud. The Trump Foundation was shut down for fraud.
He's been involved in 3500 lawsuits over the years. Even for a builder in NY, that's an extraordinary number of lawsuits.
And sure, being a national politician put a target on his back. That's how it works. Being an amazingly unrepentant a-hole also added to the target on his back, which is also entirely predictable.
If Trump hadn't committed significant fraud over the years, he wouldn't be dealing with this issue at all. If you have buddies who have done the same, I suggest you advise them to stay away from national politics.