It depends on characters and their role in your team composition. If you have a character specializing in the primary damage dealer, you need a CRIT rate. Suppose you have a character like Diluc, whose ascension stat is CRIT rate, then you can use CRIT dmg on his artifacts. This means you'll be maintaining an optimal CRIT rate to CRIT DMG ratio of 1:2. So, it's better if you focus on overall stats and manage CRIT ratios according to that. On the other hand, if you have a character who has CRIT DMG as ascension stat, you'll use CRIT rate in the goblet. It all comes down to managing character's stats in Genshin. So, having CRIT is helpful except for characters like Kokomi, whose CRIT rate becomes negative.