Am I right to understand that it will do nothing to big cities, where you share the radio frequency with lots of users just like a wifi? What it the minimum radius where two satellites will not interfere with each others (chatgpt says 40-130km radius if not allocated more spectrum)?

If that understanding is correct it means the addressable market is countryside and transportation (planes/ships/RV). Which necessarily makes starlink at most a fairly modest size ISP in terms of valuation?