We use the present simple to talk about actions we see as long term/ permanent or habitual. It is a very common and very important tense.
- Talking about regular actions or events..
- Talking about facts.
- Talking about future facts, usually found in a timetable or a chart.
Here, we are talking about our thoughts and feelings at the time of speaking. Although these feelings can be short-term, we use the present simple and not the present continuous.
- They don't ever agree with us.
- I think you are right.