8 Reasons you need a professional photographer
1. Knowledge

A professional photographer is not going to be fumbling with their equipment. The professional's knowledge of his equipment and craft has value, especially when he has 3 or 4 seconds at an event to make an image on the fly.

2. Light

Light is the tool of a photographer, not the camera which is the means by which a photographer captures light.  Whether in the studio on on location, a professional will be constantly evaluating the light for exposure and creative effect.

3. Experience

Light is the tool of a photographer, not the camera which is the means by which a photographer captures light.  Whether in the studio on on location, a professional will be constantly evaluating the light for exposure and creative effect.

4. Equipped

Light is the tool of a photographer, not the camera which is the means by which a photographer captures light.  Whether in the studio on on location, a professional will be constantly evaluating the light for exposure and creative effect.

5. Props & Backgrounds

When it comes to portrait work, there’s far more to the equation than just a camera and a basic lighting setup. The right backdrops and posing props can be crucial to a successful final result. A professional photographer will know ahead of time what backdrops to have on hand for your shoot, how to light them and what effect their lens choice will have. Your friend or relative might show up with a bedsheet and a stool from their breakfast nook; while this could work, you can count on a professional to deliver optimal results.

6. Editing & Software

A professional photographer will also own or have access to the ideal editing software and know-how to retouch and edit your photos, bringing out the very best in each one. The last thing you want is a Photoshop novice trying to retouch photos of your most prized and precious memories.

7. Professionally Invested

A professional photographer is working for you, and they are invested in your satisfaction. You are their client, not their relative or friend, and they will retain a level of professionalism your aunt or brother-in-law may not. They also have the fortitude and commitment to work for long periods without breaks and see the job through so that the best results possible are achieved.

8. Artistic Touch

Lastly, a professional photographer does not just “take snapshots”; they facilitate the creation of works of art. A professional will draw from all of their artistic training and knowledge of equipment and gear to deliver the finest-quality photographs possible. An amateur will likely be “winging it” for large portions of your shoot. 
There are a lot of ways to save money in life, but skimping on professional photography for your most precious moments should not be one of them. For timeless heirloom photos that will be cherished for generations, don’t leave your photography to chance. Invest in a professional.