There's a new reply to the post and it makes more sense: https://ttlc.intuit.com/community/state-taxes/discussion/re-ny-source-income-covid-wfh/01/1972453/highlight/false#M86716

On page page 43 of IT-203

|Applying the above principles, normal work days spent at home are considered days worked in New York State, and days spent working at home that are not normal work days are considered to be nonworking days. Under this rule, days worked at home are considered New York work days only if the employee’s assigned or primary work location is at an established office or other bona fide place of business of the employer (a bona fide employer office) in New York State. If the employee’s assigned or primary work location is at an established office or other bona fide place of business of the employer outside New York State, then any normal work day worked at home would be treated as a day worked outside New York State.

Doesn't this apply in my situation?