The bazooka does 80, the schrecks do 120.
The panzersxhreck is also more accurate, has 170 penetration compared to 120 with the bazookas, and will be fighting allied vehicles, which usually have a lot less armor. You aren't going to scratch a panther with bazookas.
Taking up 2 weapon slots to match the schreck is also a big deal.
zooks cant scratch a panther? seems like you haven't played coh2 at all.
Shreks got removed because it was causing volkblobs which was cancerous. But equally there are rifleblobs with zooks, bars, grenades, smoke and snares (sandbags, mines and lmg but are doctrinal) blobbing all over the place with its terminator veterancy (which reaches vet 3 quickly due to the ZOOKS and not just volks reaching vet 5 in no time) and so doing something about rifles is necessary.
In my opinion the vet and dual LMG's of rifles only need looking at.