The life of a politician is not an easy one, politics is a game of interest and you don't go into politics without having nothing to do as a person, you must have a second address.
You can be in the party or following your master or leadership but when it is time to favor you, they can decide to call and make use of the next person, knowing fully well that you have been in the system for a long time.
The party leaders can always remember you when it is time to organize things, do all the hard work. You will be called upon to deliver all the messages but simply because maybe you don't have B'sc. They will now bring in their own personal person and fix in your place, not minding that they have used you for years with fake promises.
So with these few points, one can stop politics without even thinking twice.
You are very right. And I have two perspective regarding your topic and I will explain it with two practical examples.
Mr Imran khan was the prime of minister of Pakistan since 2018 till 2022. As he was too straight, he started criticising the establishment knowing that the establishment is operating Pakistan since its independence and that's why he got jailed. The negotiations were offered, like leave this country and go to a country that you like but he refused and recently he was diagnosed with few severe diseases. It happened to him because he was unaware of the dirty games of the mafia setting on the top.
The second example is of Suhail afridi who was from the same party and Imran khan the ex PM announced him to be the chief minister of KPK and he started a protest campaign three months ago unaware of the game of politics he got arrested last month and is disappeared since then.
So the conclusion is simple politics isn't for everyone. It is full of twist and turns. You need to have mood swings and sometime you need to apply hypocrisy on your personality as well even if you are not. Analyze and anticipate the pros and cons and then enter in to this field.