I think I can understand it according to your idea
It is true that the electricity generated by the generator does not need to be connected to the mains electricity network, and it is not necessary to distinguish neutral and live wires
Also, if the output end of the generator is not grounded, there will be no distinction between the neutral wire and the live wire tension. This 220 V can be considered as the line voltage.
But it may be a habit developed by old electricians. I think I should respect others and pretend to be cool.
Just for fun, grab an extra electric test pen and click. on it twice, that way This other person can feel comfortable and your work can be done without problem. Obviously this person's technical affairs are very bad, so there is no need to compete with him. and it will offend everyone. PWhy bother?