The difference in scale/format can make it work, like epoch seconds versus epoch milliseconds, and integer milliseconds versus floating point seconds. If an apple is 1000₿, or a house is 2.642344₿ it's easy to infer scale. It's less ideal for sending because you might want to send "one BTC", but the sending interface could confirm the amount in "sats" ₿ before sending. In general I find displaying whole BTC to be poor UX for most people, as does using the term "sats".