Agreed. But made-up numbers are not opinions. Just like years of continuous nonsensical posts like “assume $2,000 for TTL” is not an opinion. Every line item comprising TTL is a number. Neither the line items nor the sum needs to be assumed.
Assumptions such as assuming the OP’s annual driving needs are not opinions.
Making stuff up is not an opinion and neither is it helpful. We might as well start making up RV and MF.