Here some questions for you:

#1 Do you have a smartphone?

#2 Do you mind to carry powerbank around?

#3 Do you even bother to turn on hotspot on your phone and connect your iPad to it?

#4 Do you want to look fancy with having "4G" on your iPad' top left corner?

Analyse:

#1: Yes. Go to #2.
No. Take Cellular iPad.

#2: Yes. Take Cellular iPad.
No. Take Wifi iPad.

#3: Yes. Take Cellular iPad if and only you also prefer to read on iPad.
No. Take Wifi iPad.

#4 If yes, you know what to do XD

No matter how, you do not need to spend more on cellular variant if you have a smartphone. Having a cellular ready iPad is not really practical unless you need it.

In my opinion, a traveler who travels a lot with his iPad holding on his hand, a cellular iPad is the one he shall need, searching map, real time navigation, update social media, post travel photos, looking for hotel and interest places. This is a reference for you to consider it if you find yourself doing so even you are not a traveler. Keeping iPad in the bag or holding it on your hand is a key factor, each will tell you what variant you need to choose.

I owned an iPad Pro 9.7 Cellular+Wifi and my SIM slot is still empty until now. I have an iPhone with bluetooth enabled all time which means even though I turned off personal hotspot on iPhone, my iPad will still get to see my iPhone hotspot available in the Wifi list.

Hope this will help.

FYI, iPad with cellular can be a personal hotspot too!