ᐅ Facade Paint: Should It Be Applied Once or Twice?

Hello everyone,
we are currently building a single-family house.
The one-time exterior painting is included in our contract and was completed last Friday. The plasterer offered us a second coat.
The only advantage, as we understand it, is that we would not need to repaint after 5 to 7 years, but later on.
The paint used is a Caparol silicone resin-based paint (white with a slight gray trim as a visual separation at the garage), and the cost is about 2500 euros net.
What has been your experience? Is it worth it?
Thanks in advance!

Addition: The plaster is a two-layer mineral scratch coat, approximately 20 mm thick (base coat and finish coat).

We had the exterior painted twice. I’m not very motivated to renovate a deteriorated facade after 5 years.

Applying two coats of paint makes sense.

However, I don’t understand why someone would paint a mineral-based plaster with such a crappy silicone resin paint. It just doesn’t make sense to me...

This was neither offered nor discussed with us (prefabricated house using a timber frame construction). I don't even know how often it was painted. I probably should have looked into that.

Thank you all!
We have now decided on that.

KarstenausNRW schrieb:

Applying two coats makes sense.

However, I don't understand why someone would paint such silicone resin paint over a mineral-based plaster. It just doesn't make sense to me...

What exactly would be the problem with that?
A brief explanation would be helpful for non-experts…
In any case, I discussed this with the plasterer.
He said the paint is well suited for mineral plaster. It only contains 4-5% silicone, but that’s why it has to be called silicone resin paint.