Are the ticket gachas you are thinking of ones with a guaranteed gold ticket at the end of it? (like the recent FG one).
i.e. just a random gold.
If so, I don't think that's a reasonable comparison. They're obviously comparing to their sort of default pricing for a fixed single rainbow of $60,
and if you happen to want one of these 4 I'd say it's a fair comparison. Whether or not it's a good value is a different matter.
Personally I'll pass - already have Alpinia and Dianthus, and as below: I don't need more slice rainbows particularly. (Bridal Onci is the only one on my wishlist because of enemy attack down).
Cattleya will have to pass on since I'm still leveling Ardisia.