Is the pop-up trimmer on the back of an electric shaver good to use?
Is there any reason to grow a beard?
Answer:
There is no problem to use the pop-up trimmer on the back of a shaver. It does not shave closely (hashchasa), and there is no concern of giluach.
There is no ‘halachic’ reason to grow a beard.
Based on kabballah, some do not touch the facial hair at all. Some great kabbalists, however, were clean shaven (such as the Ramchal).
Some grow a beard for social reasons (the ‘traditional Jewish look’), and this depends on one’s social environment.