As the user who doesn't like higher wagering, as long the casino not make those bonuses automatically active is fine. It always depends and the choice of the user, any promotions are really welcome as long as these typical offer is needed manually active and only by user it self (not automatically).
In practically all reputable casinos, activating bonuses is optional. The user can choose whether to claim the bonus or not—usually based on the requirements tied to it. Also, even if you claim a bonus by mistake or change your mind later, there is usually an option to cancel it, or you can contact customer support to cancel it manually for you. If you choose to do so, the bonus amount and any associated winnings will be forfeited.
Bonus requirements differ from one casino to another, but the most important thing is to make those requirements clear and easy to find.