Was there any real reason to assume progressional caterers would not be able to professionally cater? My school had a kitchen in the 90's but they closed it in

Was there any real reason to assume progressional caterers would not be able to professionally cater? My school had a kitchen in the 90's but they closed it in 2001 when my other started (and started to outsource). For 20 years, outsourcing worked just fine and saved them a ton of money.