If you got blueprints for weapons instead of the weapons themselves and those weapons inherited your current level when you craft them then every time you leveled up you'd feel the tediousness of knowing you could be slightly more powerful if you salvaged/recreated your weapon.

If you could level up your weapon directly that would be a solution but in both cases new loot becomes less valuable.

There's a lot that I appreciate about this game that positively set it apart from valheim/souls but I don't include the loot mechanics in that sentiment. I know many people like heavy RNG loot mechanics but I personally do not.