It’s not so easy.
$19,000 in ROTH is $25,080 out of your paychecks
$19,000 in TRAD is $19,000 out of your paychecks.
If you aren’t disciplined enough to invest the $6,080 difference you will come out behind.
With the Roth option, that amount is essentially invested automatically at the same rate of return as your account. You only come out behind if your tax rate in retirement is substantially less than it is now. I don’t think even FIRE individuals have low enough income to lower their tax rate that much, especially when you consider that individual rates are going back up to pre-TCJA levels in 6 years. Of course, I could be mistaken if FIRE-ers find ways to not report income.