Chrome was installed on my Samsung/Android phone by default. Google created this browser and maintains it. Chrome does not allow ads to be disabled. Even extensions and add-ons are not allowed.
No company in the world surpasses Google's parent company in advertising revenue.
Disabling ads would reduce their revenue, so it does not take much imagination to guess why they do not want us being free from advertisements.
The love of money is the root of all evil.
But the
two new browsers I recently installed block ads by default: