Where I am (Ontario, Canada) I believe it is illegal to give legal advice if not a lawyer, and to impersonate a lawyer [0]. I'm not a lawyer and could be wrong of course... but the disclaimer costs me nothing and makes it moderately less likely to be illegal (and less likely to be prosecuted even if it is illegal)

[0] https://www.canlii.org/en/on/laws/stat/rso-1990-c-l8/latest/...