If people say deposit bonus is a big trap, they are not eligible to be called as pro gambler. Simply because pro gamblers should know about deposit bonuses better than beginners so they can decide better whether to take the bonus or not. Those who consider deposit bonus as a trap are those who do not understand it well, or do not even read the whole terms behind the bonus. If gamblers understand it well and if they take it means that they are ready for all the consequences including the wagering requirement as the hardest part to complete.
Deposit bonuses are not a trap, it's just that our view thinks it's easy to do it even though if you read the terms and conditions you will realize the betting requirements that must be met... sometimes people see in terms of high percent bonuses not the conditions.
Maybe in the past we have also experienced where utilizing a deposit bonus because of course it is tempting but after more investigation it is more difficult to win because of the high betting requirements.
So just be wiser now, if you can't afford it then I myself would rather skip it.