In every explanation and definition of carpet bombing I find online the focus is on the destruction, not the method. Yes, historical examples of carpet bombing has used unguided bombs, and the targets have been indiscriminate. However what is important is the damage and the time period. That is, the damage has to be massive, involve every part of a large area, and it has to happen progressively (as opposed to all at once; this excludes the nuclear bombing of Hiroshima). The bombing of Gaza checks every one of this criteria.
What doesn’t matter is the bureaucratic process before a target is selected, whether the bomb is guided. If a military specifically targets over half of all residential building, many historic and cultural sites, civilian infrastructure, etc. runs this through lawyers, who approve the bombing, then uses precession guided bombs to destroy these targets, and does so over every area, than that is carpet bombing.
And just to hammer the point home. Hamas still to this day retains the ability to fire rockets over to Israel, despite this vast damage of civilian area. However Israel is picking their target, if they indeed intend on destroying military targets, than they are certainly doing a lousy job.