我个人认为，虽然家里的装修水电改造确实需要专业知识和经验，但也不能blindly trust the suggestions from the construction workers. They might not always have your best interests in mind, so it's important to keep your wits about you and be cautious.

For instance, when it comes to the installation of pipes and wires, some workers might suggest a "横平竖直" approach, where all the pipes are laid out horizontally or vertically for aesthetic reasons. However, this is actually against industry standards. According to national regulations, if a pipe exceeds 15cm in length or has more than two right angles, it should be equipped with additional cable trays. Instead of following these guidelines, some workers might choose to bend long pipes into arcs instead of using cable trays. Over time, these arcs can become brittle and difficult to maneuver during future repairs.

The simplest and most practical solution is point-to-point wiring - while it may not look as good as other methods, it is far easier to maintain and repair later on.

Another common misconception is that water pipes should be installed above ground ("水走天") while electrical wires should be placed below ground ("电走地"). This supposedly makes maintenance easier because any leaks will be visible immediately. However, this approach significantly increases costs by doubling material usage - all exposed piping must then be covered by ceilings before they can even function properly! Additionally, exposed piping has a shorter lifespan due to environmental factors like dust and moisture.

Lastly, many homeowners who purchase new apartments believe that they need full-scale rewiring ("全屋换线") since developers often cut corners on quality control during construction inspections. However this isn't necessarily true unless there are significant changes planned for the property over time or if there were issues with electrical capacity prior to purchase.

In conclusion: While professional advice from contractors may seem valuable at first glance (and sometimes genuinely helpful), it's crucial for homeowners-to-be like me (or you) not only listen but also question their recommendations carefully before making decisions about our homes' infrastructure upgrades!