The attachment grind should be over by mastery 20-25

Some of the attachments that might be very important for a weapon (thermals, high power optics, big mags, good suppressors, etc) take far too long to unlock and increase the disadvantages people who have less skill (lets me honest, some people are just much better or worse) and  free time vs those who do.
It also burns out people who want to use more than 1-2 favorite weapons in their entire playtime.
It would not surprise me if one of the reasons that many people are taking a time out from BF6  is this

This is why I believe that the attachment grind  should be ending at the early to mid 20s and that the rest of the ranks up to T1 should be just for bragging rights/drip/cosmetics.