‘Charge when you can’ applies when you NEED to use public charging.
If I’m arriving at home with 1% and not going out again that day then it’s absolutely fine. If I’m doing a long journey and plan to stop half way at a public charger with 1% then that’s dumb (you arrive with 2% like I did a couple of weeks ago while testing the range of my car

)
Essentially, doing multiple shorter stops in the way is better than saving it for one large stop due to risks of broken/full chargers and putting all your electric eggs in one basket.