generally yes. but we are talking about a public network facing device that is usually the first line of defense against wide Net.
that needs to be updated for new threats. those threats are not as extensive as 20 years ago (a lot of stuff are way better) but there are still bugs that appear in router as seen by news about routers hack that sometimes pop up.
some router have some features that are not in openwrt. like (hard) speed limits per device and some other management apps. they are not magic apps married to hardware and if someone wanted he is free too create them in openwrt himself.
but if you don’t need any of those niche apps(features) then going to openwrt (if your device is officially supported) makes a lot of sense.
if you use premade images from openwrt (I make images with their image builder) there is not much of learning curse besides some jargon (sysupdate, binray, repo).
in last years I used openwrt and then added the apps that I usually install on it after an upgraede and just make an image and upload that to device. but that is in the future and is not noob way to do it (it is not hard but it is not just click-and-done)
one of the reason that I went that way was because the default image didn’t include webui (you heard that right) because of size constraints and wifi was disabled by default (for security so that user had to enable it and add custom password).
now those steps are included in official image.