I got most of my weapons from buying tier 4 in different events, raids, invasions, tower of dooms. This cost me a handful of gems.
If I was starting the game now or recently, then tier 4 offers, in the majority of events we see now is just parts of a medal of summer. This isn’t really comparable imo.
If I wanted to craft the weapons, especially with more events having weapons restricted recently. I would have to use diamonds to craft these weapons in the soulforge or pray for a flash offer. This seems unnecessary. Newer players are already trying to save diamonds to catch up on mythics.
Keep the jewels for the weapon crafting but replace the diamonds with gems at least.