So much is in how something is said...

It's the difference between:

1. "Dogs should be on leashes all the time!" and
2. "I think/it's my opinion that dogs should be on leashes all the time."

The first expression makes it sound like an absolute truth - the second expression, the speaker OWNS their opinion, and makes it clear that it is THEIRS only.

So, speak FOR yourself, for your own side, not AGAINST anyone else. That works a lot better.

JMO