I've personally filled out the forms several times, for multiple periods (full and partial). However I do agree with you: sure it would be nice not to pay that fee, isn't that true of every expense in general?
It seems you either have a complicated personal situation or are in a jurisdiction that's purposefully set up to benefit/interact with the US in a tax advantagous way (aka a tax shelter, though that's going away - see general harmonization trends in EU, etc). Without delving into your personal situation, your personal tax situation should not impact your employment. Your citizenship might in certain highly regulated industries maybe. In the US you are not asked if you file joint or single on your tax return as part of the interview.
You are correct on renounciation. And worse, let's assume the renounciation fee is 1/3rd of the wealth, should your net worth be concentrated and iliquid (you own nothing but a paid off home) you now need to generate a transaction which you might not want to otherwise do (sentimental, bad timing, poor market prices for the asset or low liquidity).
If you have a complicated personal situation, you also hire professional help even if you reside purely domestically. Not fair to pin it all on the foreign taxation code.