Maybe the OP or respondents are not up to speed on developments? Lithium ion batteries have been a fire risk – but far fewer fires than fossil fuelled vehicles. Problems have been known ever since their use was adopted (for mobile phones, for instance). It is nothing new.
However, likely most new cars are now, or soon will be, using Lithium Iron Phosphate chemistry for their batteries now – the older technologies being superseded by these safer, but lower capacity designs. They operate at slightly lower voltage per cell and lower capacity, but do not easily ignite and/or burn.
Only the highest power vehicles – requiring the highest power delivery (of the older chemistries) is being used in the Tesla line-up, for instance.
I think the OP needs to read rather more comprehensively before making a post such as above. If anyone trusts a car salesperson to provide all relevant details, of whatever they are selling, is living in cloud cuckoo land. They are a salesman, rely on sales results for their income commission, and will do all they can to make a sale, any sale.