Have a few fiskars tools and agree with a lot of what you say. A fair bit of thought seems to go into making them but like your gardening trowel all that thinking may not be the best fit for all users.
Hollow handles save a lot of weight on axes etc but accidentally run one over with the tractor or trailer and you end up with a mess of razor sharp cracks and an unusable tool.
My fiskars secateurs are far from my favourite, I didnt buy them just found them on a dog walk somewhere and picked them up, they had been in the woods some time yet a little oil, cleanup and sharpen they do the job several years on.
I have a wonderful pair of traditional secateurs that I much prefer to use over an extended period, from a cutting, comfort and strength point of view they are far superior but secateurs must be the most easily misplaced item in a gardeners toolkit and the fiskars ones come out again to be used (and grumbled at) till I find the good ones again. That orange is hard to misplace.
Other manufacturers tools with hollow plastic handles I would really avoid, like you I break stuff with alarming ease, but the solid fibreglass ones from just about any manufacturer are pretty bombproof if a little heavier.