1: In a romantic sibling relationship, there is always a power imbalance. This will mostly likely lead to an unhealthy relationship. So it's a big fat no to this one.
2: Being strangers to each other could potentially get rid of the power imbalance, but the odds of it being a healthy relationship is still rather low. And like
>>2 said, if it does become sexual at some point, there's SO many problems that can arise out of that.
Incest is not taboo just because people think it's gross (although, that is still a reason, even if not a good one). It's a taboo thing because of how mentally/emotionally/physically unhealthy it can potentially be to all involved, with a greater chance at being toxic than non-incestuous relationships. Incest did use to be an acceptable thing, especially in royal families, until research showed how dangerous it could be.
3: The desire is not wrong, especially if your birth parents put you through some horrible stuff. Acting on it isn't that great though, so if being near them makes the urge too strong, I wouldn't recommend coming into contact with them.
4: Reaching out can be great. I personally have a little brother we had to put up for adoption because my parents could barely afford to care for the 4 kids they already had. I know that once he turns 18 (6 more years!), I want so badly to meet him. Maybe your (potential) siblings feel that way but don't know if you wanna meet them. However, if you feel like there will be strong conflict between you and your parents, it's probably better to first search online and see if they had any other children. And if any are adults, contact them instead of your birth parents.