But you are correct, this entire site is full of idiots confidently spouting nonsense... :-)
"Floating-point arithmetic may give inaccurate results in Excel" - https://learn.microsoft.com/en-us/troubleshoot/microsoft-365...
"Classification of Spreadsheet Errors" - https://arxiv.org/pdf/0805.4224
"A study conducted by Coopers & Lybrand found errors in 90% of the spreadsheets audited."
"Impact of Errors in Operational Spreadsheets" - https://arxiv.org/abs/0801.0715
"What We Don’t Know About Spreadsheet Errors Today" - https://arxiv.org/pdf/1602.02601