Embouchure in general

Sir , for single notes , do we always need to tongue block or can we deviate to puckering method , keeping our mouth and body relaxed ?

I know it would sound stupid because you have been stressing on togue blocking from first intro lesson itself , still bringing up this topic . Would really like what you recommend , because I am totally new to tongue blocking and it is really hard for me to get good tone and tremolo while trying to do the tongue block.

Please reply.