Question about Swisscom WLAN repeater

In principle, this is possible, but each repeater can only amplify what it receives and each signal comes out of the repeater weaker than it went in! So it is clear that there must be a good, initial signal and the more repeaters, the weaker the signal. The same applies to speed ... if I have to sprint 100 metres and still have to pass through a door, I can't be as fast as I would be without ... a repeater is always the last possible option!