I'm not the person you're asking this from, but any regulation tends to require extra work to be done. Just the fact that you need to know that you're compliant requires work. Then you have requirements such as being able to prove that users gave you this consent, being able to prove that you did delete all the user data in all the possible places (including back ups, VMs, crash dumps on developer machines etc) when requested etc.

You also have to take into account the risk of the fines. The fines are enormous and there are no guarantees that the regulators will not slap you with the highest fines "to make an example of you" or because you just rubbed them the wrong way. Even if you try your hardest to comply and think you have all the bases covered, it could very well be that you are not compliant because something was overlooked or there's a bug somewhere or something else entirely. You can never be certain about this.

Now you add up all of these costs and compare it to how much the EU market offers you. If the costs to comply exceed the income, and there's no near-future opportunities for large growth, then it would make a lot of sense to just pull out of the market.