You might find this video enlightening as well: https://m.youtube.com/watch?v=mMaQn6eBroY
In it, a (former?) US Matine talks in detail about the Kurdish tunnels he saw and US tunnels he used in during his deployment, and how difficult they are to infiltrate and destroy, as well as how comfortable some of them are.
It does not sound at all trivial to beat tunnels. They are powerful fortifications.
You might find this video enlightening as well: https://m.youtube.com/watch?v=mMaQn6eBroY In it, a (former?) US Matine talks in detail about the Kurdish tunnels he saw and US tunnels he used in during his deployment, and how difficult they are to infiltrate and destroy, as well as how comfortable some of them are.
It does not sound at all trivial to beat tunnels. They are powerful fortifications.
I found a YouTube link in your comment. Here are links to the same video on alternative frontends that protect your privacy: