Numbers with a dot or comma means it's decimal. Your date reference makes no sence because either / or - is used in those cases, not dots or comma's.
Basically, having a dot or comma adds to the confusion when working with non decimal numbers.
In my (european) country a dot is used - for example 5.11.2023.
w36:2
But it wouldn't cause nearly as much confusion or decimal place issues relating to improper automation.
But... It doesn't in IP addresses, version numbers, dates, with different locales, and possibly many other uses.
These examples clearly show that "numbers with a dot" doesn't always mean decimal.
A dot is a dot. Mainly with the _role_ of a separator. When you interpret it, it might mean a _decimal_ separator for you, but as well might mean a thousand-separator for MS excel with the German locale.
That dot has many interpretations; in dates, sometimes it separates the month from year, or the day from a month. In version numbers, it separates major from minor, etc.
It's so much not a "decimal point", that in some languages (Hungarian and German, for instance) it is a thousands separator, whereas for decimal fractions a comma is used (10,000.00 in English is 10.000,00 in Hungarian, making Excel flip)
It is really just a dot. Our interpretation is what makes it a certain kind of separator. Or not a separator at all, like at the end of this sentence.