All the boxes from booster1 were like this.  Really easy to open and reglue.  Thats why the changed it int booster2.

As long as you cards are still sealed in the platic bag you are OK.  But it was really easy for “bad” people to open a box to see what was inside. If they didn’t like… just heat the glue a litte and reclose the box

I guess wizards took the decision purely on low cost… cheap bastards !!