Yeah that is true. It would just be nicer to reduce cheating however in some way without game breaking but benefiting every player and reducing a need to cheat.
I prefer mythics and legends over Eternals but having the ability of editing legend pets is very powerful. It wasn't really thought as a good idea until recently but it's very nice. Although editing eternal pets would be cool. Eternal pets usually take lots of effort to even find and are far rarer than even eternal maps and eternal legend gear drops. Sometimes you get real good eternal pets and others can be terrible .
Normal Eternals if they are terrible it's understandable but pets are randomised which is either good or bad. Although some control over eternal pets could be a good level playing field against the cheating folks who cheat their way without any effort. I know not everyone but the people who work hard enough get eternal pets let alone a desired set affix eternal pet but it could revive some pets.
I know there is the issue of losing value but they would still have high rarity and be seen as something to really be motivated for since you could edit instead of just saying, oh it's cool. Costing a bunch of crystals more than normal legend pet editing like 50 sapphires or 100 and/or larimar but no kyanite . Or some other huge cost that doesn't make it too easy to break the game balance that way.
I Initially thought even editing eternal pets legit would make them lose their value but not if they are high cost . Although maybe that may not be necessary since eternal pets aren't as rare as say patch 2.0 days . I had much harder time farming things in general though than now since I sucked at the game at one point and there were no Ascensions or anything of the sort. Eternal pets were possible but no treasured perk either or 1012% luck or anything we have for granted today. I kinda wish I started off this year but at the same time, I'm grateful I started much earlier since I gathered so much knowledge and have fun many times.
Although if it's still game breaking, yeah maybe we can keep eternal pets unchanged. Eternals have already become so easy due to dust alone (though expensive unless you find them first but still pricey)