That's a very good list. I would also add the following reasons why it's in the interest of US citizens to file their US tax return while living abroad:

Why Expats Should File U.S. Tax Return - https://www.taxesforexpats.com/expat-tax-advice/why-file.html

It's the law - If you are a U.S. citizen or resident alien, you must report income from all sources within and outside of the U.S. It's that simple. Whether or not you end up paying tax on that income is irrelevant - the income itself must be reported.
We might as well end the list right here but there are five more reasons that actually make filing U.S. Tax Return advantageous to you:

You can only claim foreign income exclusion if you file the tax return. If you fail to file, the exclusion would be not applicable to you and you may be liable penalties.

There is a three year statute of limitations on filed tax returns. If you do not file, the statute of limitations never runs out. Therefore it is in your interest to file to 'run the clock' and not leave yourself exposed to an audit down the road.

Most of our clients never actually have to pay anything to the IRS - the combination of taxes paid in the host country and various deductions available to expats results in no cash outlays.

If you are a green-card holder, filing U.S. tax return establishes "good moral character" in the eyes of INS USCIS for immigration compliance.

If you do owe money to the IRS and do not report it, you are liable to pay penalties and interest, which accrue in perpetuity. After about five years, the amount of penalties accrued may more than double the original tax bill (compare it with stock market performance, which is flat for the last 10 years).

These are the six reasons why you should file a US tax return. We have also prepared a list of reasons why you should enlist the services of Taxes for Expats to help you file (https://www.taxesforexpats.com/about/why-hire.html)