Easy to say, but hard to do when the people who you genuinely value your relationship with don't use anything else. It's also not intended for "chitchatting about nothing of lasting consequence". It's specifically intended to basically be your entire life. In China you can pay all your bills, manage your bank account, buy plane, train tickets, hotel reservations, donate to charities, rent bikes, shop online, order food, and pretty much
everything else you would possibly need to do. In the USA, for its active users it basically is
all of social life. Potlucks, random dinner parties, hiking trips, wedding invitations, reading groups, badminton court reservations, even ordering gig economy homemade food, it ALL happens on WeChat, right here in Palo Alto, if you are part of the community that uses it.
I do agree though -- avoid using WeChat at all costs for anything secret. I have multiple WeChat accounts and sent a message from one to the other containing a link to one of my own servers. From the server logs, nobody accessed the link. Sent it again with some "interesting" keywords, and lo and behold, the link was accessed by an IP in China.
And "interesting" keywords were nothing of political significance. More business-wise interesting. I have belief that Tencent is spying on certain conversations beyond what government censorship requires them to do.